J. Phys. IV France
Volume 123, March 2005
Page(s) 307 - 311

J. Phys. IV France 123 (2005) 307-311

DOI: 10.1051/jp4:2005123055

Corrosion inhibition of 70Cu-30Zn alloy in 0,5 M HNO3 by 3-amino-1,2,4-triazole

S. El Issami1, L. Bazzi1, M. Mihit1, M. Hilali1, R. Salghi2 and H. El Ait Addi3

1  Laboratoire de Chimie-Physique, Département de Chimie Faculté des Sciences, BP. 28/S, Agadir, Maroc
2  Laboratoire d'Analyse Agro-Alimentaire, École Supérieure de Technologie d'Agadir, Agadir, Maroc
3  Laboratoire de l'Établissement Autonome de Contrôle et de Coordination des Exportations d'Agadir, Agadir, Maroc

The inhibitive action of 3-amino-1,2,4-triazole (ATA) on 70Cu-30Zn alloy corrosion in HNO3 0,5M was examined. Gravimetric and electrochemical tests were used. The results obtained show that the ATA reduces effectively the dissolution of 70Cu-30Zn alloy. The inhibition efficiency in aerated acid increased with increasing ATA concentration to a maximum of 69% at 10-2M. The adsorption of the inhibitor is found to obey to the Langumir adsorption isotherm.

© EDP Sciences 2005